- Versatile Application: The rubber frost protection expansion plug serves multiple purposes. It can be used as a plug for oil drains, oil return lines, and cleaning pipes, effectively preventing water ingress and corrosion during winter months. - Durable Materials: Constructed from stainless steel, the metal components resist rust, while the heavy-duty rubber ensures a secure and lasting fit. - Winter Functionality: Ideal for winter use, these frost protection plugs are essential for draining pool pipes, protecting against water infiltration and frost damage. They provide reliable sealing for underground piping systems. - Pool Cleaning Set: This product is also designed for cleaning the interior walls of pools, making it suitable for various applications, including swimming pools, spas, bathtubs, vinyl liners, water parks, aquariums, fountains, and fish tanks. Key Features: - Material: Heavy-duty rubber and rust-resistant stainless steel - Function: Prevents water entry and frost damage; facilitates efficient cleaning - Compatibility: Suitable for various drainage and cleaning scenarios Use Scenarios: 1. Securely plug oil drain lines during winter to prevent corrosion and damage. 2. Effectively seal pool pipes to avoid freeze-related issues in cold weather. 3. Clean pool interiors and maintain hygiene in water features with ease.